20413899 has 24 divisors (see below), whose sum is σ = 33042672. Its totient is φ = 12035520.

The previous prime is 20413891. The next prime is 20413901. The reversal of 20413899 is 99831402.

It is not a de Polignac number, because 20413899 - 2³ = 20413891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20413891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 877 + ... + 6449.

It is an arithmetic number, because the mean of its divisors is an integer number (1376778).

Almost surely, 2^20413899 is an apocalyptic number.

20413899 is a deficient number, since it is larger than the sum of its proper divisors (12628773).

20413899 is a wasteful number, since it uses less digits than its factorization.

20413899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627 (or 5624 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20413899 is about 4518.1742994267. The cubic root of 20413899 is about 273.3014823419.

It can be divided in two parts, 20413 and 899, that added together give a palindrome (21312).

The spelling of 20413899 in words is "twenty million, four hundred thirteen thousand, eight hundred ninety-nine".